US4089622A - Vacuum generator - Google Patents

Vacuum generator Download PDF

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Publication number
US4089622A
US4089622A US05/698,572 US69857276A US4089622A US 4089622 A US4089622 A US 4089622A US 69857276 A US69857276 A US 69857276A US 4089622 A US4089622 A US 4089622A
Authority
US
United States
Prior art keywords
valve
passage
vacuum
motive fluid
lip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/698,572
Other languages
English (en)
Inventor
John Anton Aubel
Clarence Dennis Fox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BorgWarner Automotive Electronic and Mechanical Systems Corp
Original Assignee
Borg Warner Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Borg Warner Corp filed Critical Borg Warner Corp
Priority to US05/698,572 priority Critical patent/US4089622A/en
Priority to CA273,280A priority patent/CA1066679A/en
Priority to GB10745/77A priority patent/GB1524661A/en
Priority to AR267069A priority patent/AR211366A1/es
Priority to JP4341477A priority patent/JPS53411A/ja
Priority to DE2723437A priority patent/DE2723437C2/de
Priority to BR7703689A priority patent/BR7703689A/pt
Priority to AT430777A priority patent/AT347002B/de
Priority to FR7719133A priority patent/FR2356026A1/fr
Application granted granted Critical
Publication of US4089622A publication Critical patent/US4089622A/en
Assigned to BORG-WARNER AUTOMOTIVE ELECTRONIC & MECHANICAL SYSTEMS CORPORATION reassignment BORG-WARNER AUTOMOTIVE ELECTRONIC & MECHANICAL SYSTEMS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BORG-WARNER CORPORATION, A DE CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42

Definitions

  • the present invention relates to vacuum generators of the type in which a motive fluid flowing through an ejector pump creates a vacuum. More particularly the invention relates to valve means for controlling the flow of motive fluid in such a vacuum generator.
  • valve operator means which moves the control valve between open and closed positions in order to reduce the losses arising from flow through the valve.
  • a lost motion valve operator means for this purpose.
  • Such devices are often complicated in structural organization and occupy considerable space.
  • improvements in means for controlling the flow of motive fluid are desirable, particularly improvements which would result in a simpler more compact structural organization.
  • the present invention relates to improvements in vacuum generators of the type which employs flow of motive fluid through an ejector pump, and more particularly relates to improvements in controlling the flow of the motive fluid therein. It is an object of the present invention to provide valve means for controlling the flow of motive fluid in a vacuum generator wherein hysteresis is imposed upon a valve member for modifying its response to a control condition. It is a further object of the invention to employ the pressure of motive fluid in combination with a pressure responsive friction device for imposing a frictional retarding force on a valve member movable for controlling the flow of the motive fluid.
  • FIG. 1 is a schematic representation of a pneumatic circuit including a vacuum generator
  • FIG. 2 is an elevation view of a vacuum generator according to the present invention
  • FIG. 3 is a section view taken along the line 3--3 of FIG. 2;
  • FIG. 4 is a section view taken along the line 4--4 of FIG. 3.
  • FIG. 1 a vacuum system is shown schematically in FIG. 1 including a vacuum generator 10 connected to a motive fluid circuit and to a vacuum circuit.
  • the motive fluid circuit is indicated schematically by air compressor 11, compressed air storage tank 12 and connecting conduits 13, 14 arranged for supplying air under pressure to the vacuum generator.
  • the vacuum circuit is indicated schematically by check valve 16, vacuum canister or reservoir 17, vacuum operated devices 18, 19 and connecting conduits 21, 22, 23, 24, 25.
  • a feedback conduit 26 is connected between the vacuum circuit and a control portion of vacuum generator 10 such that the vacuum level in the vacuum circuit may be employed for controlling operation of the vacuum generator.
  • the vacuum generator 10 is shown to enlarged scale in FIGS. 2, 3 and 4 and includes a body 31 and a cover 32.
  • Body 31 includes an inlet portion 33 having an internally threaded opening 34 to facilitate connection to a source of motive fluid such as conduit 14.
  • An inlet port 36 extends from opening 34 to a valve seat 36 which communicates with an internal passage 38.
  • Body 31 also includes an exhaust portion 41 which receives an ejector nozzle 42 and an exhaust nozzle 43 spaced from each other to define a vacuum cavity 44, ejector nozzle 42 being in fluid communication with passage 38, and arranged to conduct the flow of motive fluid from passage 38 toward cavity 44 and exhaust nozzle 43.
  • Ejector nozzle 42 includes a converging inlet 46 and a diverging outlet 47 arranged for transforming the energy of fluid pressure into fluid velocity.
  • Exhaust nozzle 43 includes a converging inlet 48 joining an outlet portion 49 which communicates with atmosphere through an end surface 51 of exhaust portion 41.
  • the ejector nozzle 42, vacuum cavity 44 and exhaust nozzle 43 are arranged to form an ejector pump for producing a vacuum in cavity 44.
  • Ejector pump apparatus is known in the prior art, and therefore an extensive description of such devices is believed unnecessary.
  • a vacuum portion 56 of body 31 includes a vacuum port 57 communicating with vacuum cavity 44 and extending through a tube connector portion 58.
  • the configuration of tube connector portion 58 is selected for facilitating connection to a flexible tube indicated schematically by reference character 21 of FIG. 1.
  • a control port 61 is formed in body 31 and is arranged to provide communication between a tube connector portion 62 and a control chamber 63 which is also formed in body 31.
  • the control chamber 63 is defined in part by a cup-like portion 64 of body 31 and by a diaphragm 66 secured to a rim portion 67 of the body by the cover 32.
  • An atmospheric chamber 68 is formed between diaphragm 66 and cover 32 and communicates with atmosphere through aperture 69.
  • An annular boss portion 71 is formed in body 31 so as to extend within control chamber 63.
  • a bore 72 is formed in boss 71 which terminates in passage 38 and valve seat 37.
  • a valve member 73 includes a plate portion 74 engaging diaphragm 66 and a depending stem portion 76 slideable in bore 72 for movement toward and from valve seat 37.
  • Stem portion 76 includes supplemental lift surfaces 77, 78 exposed to passage 38.
  • a web portion 79 extends from supplemental surfaces 77, 78 and terminates in a flange 81, groove 82 and nose 83.
  • An O-ring seal 84 is mounted in groove 82 arranged for sealing engagement with valve seat 37.
  • a bias spring 86 is seated in cup-like portion 64 and engages plate portion 74 urging valve 73 upwardly as viewed in FIG. 3 so as to urge O-ring 84 away from engagement with valve seat 37.
  • a pressure responsive frictional damping device 87 is provided in the form of an annular rubber-like U-shaped seal including inner 88 and outer 89 sealing lips and a backing ring 91. Damping device 87 is secured in annular boss 71 by means of a retaining ring 92.
  • vacuum generator 10 will now be described with particular reference to FIGS. 3 and 4 assuming that the generator has been connected in a system as shown in FIG. 1, that is, that a source of compressed air is available to inlet port 36, that vacuum port 57 is connected to a vacuum circuit and that a vacuum feedback signal is present in control chamber 63 through control port 61.
  • valve 73 closes valve seat 37
  • forces acting on the valve are as follows.
  • the pressure of the compressed air (motive fluid) acts on nose 83 urging the valve away from seat 37
  • atmospheric pressure is present in the ejector pump and passage 38 where it acts on supplemental surfaces 77, 78 and also on inner lip 88 by means of leakage between stem 76 and bore 72 thereby pressing inner lip 88 against stem 76 to provide a frictional holding force opposing sliding movement of the valve stem
  • spring 86 exerts a force tenting to urge the valve away from seat 37
  • these forces are opposed by the sub-atmospheric vacuum depression present in control chamber 63 which in combination with atmospheric pressure present in atmospheric chamber 68 act to maintain the valve in engagement ewith seat 37.
  • the pressure differential across diaphragm 66 is sufficiently strong to slide valve 73 to closure with seat 37 against the force of friction provided by lip 88 and against the bias of spring 86 and the pressure of motive fluid acting on supplemental surfaces 77, 78.
  • the pressure in passage 38 returns to atmospheric which relieves the pressure acting on supplemental surfaces 77, 78 and at the same time reduces the pressure differential across lip 88 and consequently reduces the frictional damping force exerted on stem 76 by lip 88.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US05/698,572 1976-06-22 1976-06-22 Vacuum generator Expired - Lifetime US4089622A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US05/698,572 US4089622A (en) 1976-06-22 1976-06-22 Vacuum generator
CA273,280A CA1066679A (en) 1976-06-22 1977-03-07 Vacuum generator
GB10745/77A GB1524661A (en) 1976-06-22 1977-03-14 Vacuum generator
AR267069A AR211366A1 (es) 1976-06-22 1977-03-31 Generator de vacio
JP4341477A JPS53411A (en) 1976-06-22 1977-04-15 Highhvacuum systems
DE2723437A DE2723437C2 (de) 1976-06-22 1977-05-24 Treibmittelzuschaltventil für eine Strahlpumpe
BR7703689A BR7703689A (pt) 1976-06-22 1977-06-07 Gerador de vacuo
AT430777A AT347002B (de) 1976-06-22 1977-06-17 Vakuumgenerator
FR7719133A FR2356026A1 (fr) 1976-06-22 1977-06-22 Dispositif pour faire le vide du type ejecteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/698,572 US4089622A (en) 1976-06-22 1976-06-22 Vacuum generator

Publications (1)

Publication Number Publication Date
US4089622A true US4089622A (en) 1978-05-16

Family

ID=24805819

Family Applications (1)

Application Number Title Priority Date Filing Date
US05/698,572 Expired - Lifetime US4089622A (en) 1976-06-22 1976-06-22 Vacuum generator

Country Status (9)

Country Link
US (1) US4089622A (ja)
JP (1) JPS53411A (ja)
AR (1) AR211366A1 (ja)
AT (1) AT347002B (ja)
BR (1) BR7703689A (ja)
CA (1) CA1066679A (ja)
DE (1) DE2723437C2 (ja)
FR (1) FR2356026A1 (ja)
GB (1) GB1524661A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485782A (en) * 1982-04-12 1984-12-04 Aisin Seiki Kabushiki Kaisha Constant speed control devices for vehicles
US4549854A (en) * 1983-04-15 1985-10-29 Kabushiki Kaisha Myotoku Vacuum generating device
US4735554A (en) * 1986-02-24 1988-04-05 The B.F. Goodrich Company Self-regulating deicer valve
US5000665A (en) * 1990-02-28 1991-03-19 American Standard Inc. Adjustable flow mini whirlpool jet
US5188411A (en) * 1991-01-24 1993-02-23 John A. Blatt Vacuum cup control apparatus
WO1993004824A1 (en) * 1991-09-09 1993-03-18 Blatt John A Vacuum cup control apparatus
US5277468A (en) * 1991-01-30 1994-01-11 John A. Blatt Vacuum control apparatus
FR2834017A1 (fr) * 2001-12-21 2003-06-27 Marwal Systems Pompe a jet
CN105032297A (zh) * 2015-06-09 2015-11-11 郭斌 一种高强度真空发生器

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57212400A (en) * 1981-06-22 1982-12-27 Aisin Seiki Co Ltd Vacuum generating apparatus
JPS60175800A (ja) * 1984-02-21 1985-09-09 Miyoutoku:Kk エゼクタポンプ
US4842946A (en) * 1987-09-28 1989-06-27 General Electric Company Method for treating a polyimide surface to improve the adhesion of metal deposited thereon, and articles produced thereby
DE10116698A1 (de) * 2001-03-29 2002-10-10 Airtec Pneumatic Gmbh Regelvorrichtung für pneumatisch betriebene Ejektoren und Ejektoren mit derartigen Regelvorrichtungen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1159957A (en) * 1915-08-04 1915-11-09 Sellers William & Co Inc Jet apparatus.
US1180017A (en) * 1915-03-31 1916-04-18 Thomas L Davenport Vacuum-jet.
US1441651A (en) * 1920-10-25 1923-01-09 Charles E Anderson Automatic vacuum producer
US2340671A (en) * 1942-02-04 1944-02-01 Sellers William & Co Inc Injector
US2765185A (en) * 1951-10-24 1956-10-02 Honeywell Regulator Co Shaft seal
US3435841A (en) * 1966-02-21 1969-04-01 Omark Air Controls Inc Dental aspirator
US3593958A (en) * 1969-06-06 1971-07-20 Robertshaw Controls Co Pneumatically operated valve means and parts therefore or the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR806127A (fr) * 1936-05-08 1936-12-08 Robinetterie S A J Soc D Soupape de sûreté pour liquides
US2634943A (en) * 1947-04-02 1953-04-14 Eljer Company Faucet
FR1040033A (fr) * 1950-07-28 1953-10-12 Bendix Aviat Corp Soupape susceptible d'être utilisée comme soupape de décompression pour systèmeshydrauliques à pompe-servo
US2934086A (en) * 1958-04-16 1960-04-26 Leland F Blatt Vacuumatic valve
US3192942A (en) * 1961-08-15 1965-07-06 Rockwell Mfg Co Plug valve assembly
DE1952301A1 (de) * 1969-10-17 1971-04-29 Alup Kompressorenfabrik Adolf Absperrventil fuer Verdichteranlagen
DE7130857U (de) * 1971-08-11 1972-05-10 Samson Apparatebau Ag Pneumatisches membranventil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1180017A (en) * 1915-03-31 1916-04-18 Thomas L Davenport Vacuum-jet.
US1159957A (en) * 1915-08-04 1915-11-09 Sellers William & Co Inc Jet apparatus.
US1441651A (en) * 1920-10-25 1923-01-09 Charles E Anderson Automatic vacuum producer
US2340671A (en) * 1942-02-04 1944-02-01 Sellers William & Co Inc Injector
US2765185A (en) * 1951-10-24 1956-10-02 Honeywell Regulator Co Shaft seal
US3435841A (en) * 1966-02-21 1969-04-01 Omark Air Controls Inc Dental aspirator
US3593958A (en) * 1969-06-06 1971-07-20 Robertshaw Controls Co Pneumatically operated valve means and parts therefore or the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485782A (en) * 1982-04-12 1984-12-04 Aisin Seiki Kabushiki Kaisha Constant speed control devices for vehicles
US4549854A (en) * 1983-04-15 1985-10-29 Kabushiki Kaisha Myotoku Vacuum generating device
US4735554A (en) * 1986-02-24 1988-04-05 The B.F. Goodrich Company Self-regulating deicer valve
US5000665A (en) * 1990-02-28 1991-03-19 American Standard Inc. Adjustable flow mini whirlpool jet
US5188411A (en) * 1991-01-24 1993-02-23 John A. Blatt Vacuum cup control apparatus
US5201560A (en) * 1991-01-24 1993-04-13 John A. Blatt Vacuum cup control apparatus
US5277468A (en) * 1991-01-30 1994-01-11 John A. Blatt Vacuum control apparatus
WO1993004824A1 (en) * 1991-09-09 1993-03-18 Blatt John A Vacuum cup control apparatus
FR2834017A1 (fr) * 2001-12-21 2003-06-27 Marwal Systems Pompe a jet
CN105032297A (zh) * 2015-06-09 2015-11-11 郭斌 一种高强度真空发生器

Also Published As

Publication number Publication date
FR2356026A1 (fr) 1978-01-20
JPS53411A (en) 1978-01-06
CA1066679A (en) 1979-11-20
ATA430777A (de) 1978-04-15
GB1524661A (en) 1978-09-13
DE2723437A1 (de) 1977-12-29
BR7703689A (pt) 1978-03-21
JPS6224640B2 (ja) 1987-05-29
DE2723437C2 (de) 1983-01-20
AR211366A1 (es) 1977-11-30
FR2356026B1 (ja) 1981-05-08
AT347002B (de) 1978-12-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BORG-WARNER AUTOMOTIVE ELECTRONIC & MECHANICAL SY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BORG-WARNER CORPORATION, A DE CORPORATION;REEL/FRAME:005970/0275

Effective date: 19911223